A kind of L-valine purification equipment and purification method

Abstract

The present invention discloses a purification device for L-valine and a purification method thereof, including a storage mechanism, the storage mechanism is used to store garbage in an L-valine mixture, and a support leg arranged at the bottom of the storage mechanism, a separation mechanism, the separation mechanism is used to separate solids and liquids in the L-valine mixture, a crystallization mechanism, the crystallization mechanism is used to solidify and crystallize the L-valine solution, and the top of the support leg is fixedly connected to the bottom of the storage mechanism. The present invention relates to the technical field of L-valine purification; when the L-valine mixed solution enters the interior of the separation cylinder through a feed pipe, the L-valine solution can be separated from garbage impurities by centrifugal force through the cooperation of an intercepting cylinder, a filter hole, a first drive motor, a transmission shaft, a stirring blade and a cleaning soft brush, so as to avoid affecting the purity of L-valine extraction, and at the same time, the filter hole can be scrubbed to avoid garbage impurities clogging the filter hole and affecting its separation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of L-valine purification, in particular to an L-valine purification device and a purification method thereof. Background Art

[0002] L-valine is an essential amino acid for the human body. It has the functions of maintaining the normal functioning of the nervous system, enhancing immunity, and promoting liver regeneration. When the human body lacks L-valine, it is easy to cause growth stagnation and movement disorders. When the human body is severely deficient in L-valine, it will affect the growth and development of the body, causing neurological disorders, movement disorders, anemia, etc. As a nutritional supplement, it can be used together with other essential amino acids to prepare amino acid infusions and comprehensive amino acid preparations. L-valine is the key starting material for the preparation of valsartan, valganciclovir, ritonavir and lopinavir. It can also be used as an anti-tumor drug with amino acids as carriers, synthetic peptide drugs and food antioxidants, etc. Therefore, L-valine has great utilization value in the pharmaceutical and food industries.

[0003] The existing L-valine purification equipment and purification method have a relatively simple structure. At present, the garbage impurities separated during the extraction process of L-valine are generally discharged at will, and the staff need to collect and clean them manually, which greatly increases the labor intensity of the staff. At the same time, after the L-valine crystallizes, it needs to be dried by another equipment, and the process is complicated.

[0004] Therefore, the present invention provides a purification device and a purification method of L-valine to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an L-valine purification device and a purification method thereof, which solve the above problems.

[0006] To achieve the above object, the present invention is implemented by the following technical scheme: a purification device for L-valine, comprising:

[0007] A storage mechanism, the storage mechanism is used to store garbage in the L-valine mixture, and a support leg arranged at the bottom of the storage mechanism;

[0008] A separation mechanism, the separation mechanism is used to separate the solid and the liquid in the L-valine mixture;

[0009] A crystallization mechanism, the crystallization mechanism is used to solidify and crystallize the L-valine solution;

[0010] The top of the support leg is fixedly connected to the bottom of the storage mechanism, the inner wall of the storage mechanism is fixedly connected to the side wall of the crystallization mechanism, the top of the storage mechanism is fixedly connected to the bottom of the separation mechanism, and the top of the storage mechanism is communicated with the bottom of the separation mechanism;

[0011] Wherein, the storage mechanism comprises:

[0012] A crystallization cylinder, which is used to solidify and crystallize L-valine;

[0013] The top of the crystallization cylinder is fixedly connected to the bottom of the separation mechanism, and the bottom of the crystallization cylinder is fixedly connected to the top of the supporting leg.

[0014] Preferably: the separation mechanism includes a separation cylinder, the top of the separation cylinder is fixedly connected to the bottom of the crystallization cylinder, the top of the separation cylinder is fixedly connected to a first drive motor, the output end of the first drive motor is fixedly connected to a transmission shaft, the side wall of the transmission shaft is fixedly connected to a stirring blade, the side of the stirring blade away from the transmission shaft is fixedly connected to a cleaning soft brush, the top of the inner wall of the separation cylinder is fixedly connected to a water level monitor, the top of the separation cylinder is connected to a feed pipe, the feed pipe is provided with a one-way valve, the inner wall of the separation cylinder is fixedly connected to an intercepting cylinder, a filter hole is opened in the intercepting cylinder, and the bottom of the separation cylinder is connected to a feed pipe.

[0015] Preferably, the cleaning soft brush is slidably connected to the inner wall of the blocking cylinder at a side away from the stirring blade, the side wall of the transmission shaft penetrates the separation cylinder, and the side wall of the transmission shaft is rotatably connected to the inner wall of the separation cylinder.

[0016] Preferably: the storage mechanism also includes an electric telescopic tube, the top of the electric telescopic tube is connected to the bottom of the separation cylinder, the electric telescopic tube is provided with a first solenoid valve, the side wall of the electric telescopic tube is slidably connected with a connecting tube, the bottom of the connecting tube is connected to a storage box, the top of the crystallization cylinder is provided with a slide groove, and the bottom of the inner wall of the slide groove is fixedly connected to an electric slide rail.

[0017] Preferably, the electric slide rail is slidably connected to the storage box via an electronic slider, and the side wall of the storage box is slidably connected to the inner wall of the slide groove.

[0018] Preferably: the crystallization mechanism includes a drying box, the inner wall of the crystallization cylinder is fixedly connected to the side wall of the drying box, the inner wall of the crystallization cylinder is slidably connected with a rotating plate, the top of the rotating plate is fixedly connected with a rotating blade, the bottom of the rotating plate is fixedly connected with a reset spring, the top of the inner wall of the crystallization cylinder is fixedly connected with a second drive motor, the top of the inner wall of the crystallization cylinder is fixedly connected with a protection bin, the second drive motor is fixedly connected with a rotating block through the output end, a slot is provided at the bottom of the reset spring, the side wall of the crystallization cylinder is connected with a liquid inlet pipe, the liquid inlet pipe is provided with a second solenoid valve, the side wall of the crystallization cylinder is connected with an extraction pipe, and the extraction pipe is provided with a third solenoid valve.

[0019] Preferably, the side wall of the rotating block is slidably connected to the inner wall of the slot, the side wall of the rotating block passes through the protection bin, and the side wall of the rotating block is rotatably connected to the inner wall of the protection bin, and the side wall of the rotating blade is rotatably connected to the inner wall of the crystallization cylinder.

[0020] A method for purifying L-valine comprises the following steps:

[0021] S1. The staff inputs the L-valine mixed solution into the separation cylinder through the feed pipe to separate the solid and liquid;

[0022] S2. After the L-valine mixed solution is separated, the garbage impurities are input into the storage box through the electric telescopic tube and the connecting tube for collection and storage;

[0023] S3, the L-valine solution enters the crystallization cylinder, and the first solenoid valve inputs the regulating solution to react with the L-valine solution for crystallization;

[0024] S4. After the L-valine is crystallized, a drying oven is started to dry it to extend its storage time.

[0025] The present invention provides an L-valine purification device and a purification method thereof. Compared with the prior art, the device has the following beneficial effects:

[0026] (1) The L-valine purification device and purification method thereof, when the L-valine mixed solution enters the interior of the separation cylinder through the feed pipe, the L-valine solution and the garbage impurities can be separated by centrifugal force through the cooperation of the blocking cylinder, the filter hole, the first drive motor, the transmission shaft, the stirring blade and the cleaning soft brush, so as to avoid the garbage impurities affecting the purity of the L-valine extraction, and at the same time, the filter hole can be brushed to avoid the garbage impurities clogging the filter hole and affecting its separation efficiency.

[0027] (2) The L-valine purification device and the purification method thereof, when the L-valine solution enters the interior of the crystallization cylinder through the feed pipe, the L-valine can be solidified and crystallized through the cooperation of the liquid inlet pipe, the drying box, the second drive motor, the rotating plate, the rotating block, the slot and the rotating blades, and at the same time, the liquid on the surface of the L-valine crystals can be dried, which is conducive to storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the L-valine purification device of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the separation mechanism of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the storage mechanism of the present invention;

[0031] Figure 4It is a schematic diagram of the structure of the crystallization mechanism of the present invention;

[0032] Figure 5 It is a schematic diagram of the internal structure of the crystallization cylinder of the present invention.

[0033] In the figure: 1. support leg; 2. separation mechanism; 3. storage mechanism; 4. crystallization mechanism; 20. separation cylinder; 21. first drive motor; 22. transmission shaft; 23. stirring blade; 24. cleaning soft brush; 25. water level monitor; 26. feed pipe; 27. blocking cylinder; 28. filter hole; 29. ​​feed pipe; 30. crystallization cylinder; 31. electric slide rail; 32. storage box; 33. connecting pipe; 34. first solenoid valve; 35. electric telescopic pipe; 36. slide; 40. drying box; 41. rotating plate; 42. rotating blade; 43. liquid inlet pipe; 431. second solenoid valve; 44. extraction pipe; 441. third solenoid valve; 45. reset spring; 46. second drive motor; 47. protection bin; 48. rotating block; 49. slot. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] See also Figure 1-Figure 2 , a purification device for L-valine and a purification method thereof, comprising:

[0037] A storage mechanism 3, the storage mechanism 3 is used to store garbage in the L-valine mixture, and a support leg 1 is arranged at the bottom of the storage mechanism 3;

[0038] Separation mechanism 2, the separation mechanism 2 is used to separate the solid and the liquid in the L-valine mixture;

[0039] A crystallization mechanism 4, the crystallization mechanism 4 is used to solidify and crystallize the L-valine solution;

[0040] The top of the support leg 1 is fixedly connected to the bottom of the storage mechanism 3, the inner wall of the storage mechanism 3 is fixedly connected to the side wall of the crystallization mechanism 4, the top of the storage mechanism 3 is fixedly connected to the bottom of the separation mechanism 2, and the top of the storage mechanism 3 is communicated with the bottom of the separation mechanism 2;

[0041] Wherein, the storage mechanism 3 comprises:

[0042] A crystallization cylinder 30, which is used to solidify and crystallize L-valine;

[0043] The top of the crystallization cylinder 30 is fixedly connected to the bottom of the separation mechanism 2, and the bottom of the crystallization cylinder 30 is fixedly connected to the top of the support leg 1;

[0044] The separation mechanism 2 includes a separation cylinder 20, the top of the separation cylinder 20 is fixedly connected to the bottom of the crystallization cylinder 30, the top of the separation cylinder 20 is fixedly connected to a first drive motor 21, the output end of the first drive motor 21 is fixedly connected to a transmission shaft 22, the side wall of the transmission shaft 22 is fixedly connected to a stirring blade 23, the side of the stirring blade 23 away from the transmission shaft 22 is fixedly connected to a cleaning soft brush 24, the top of the inner wall of the separation cylinder 20 is fixedly connected to a water level monitor 25, the top of the separation cylinder 20 is connected to a feed pipe 26, the feed pipe 26 is provided with a one-way valve 261, the inner wall of the separation cylinder 20 is fixedly connected to an interception cylinder 27, a filter hole 28 is opened in the interception cylinder 27, the bottom of the separation cylinder 20 is connected to a feed pipe 29, the side of the cleaning soft brush 24 away from the stirring blade 23 is slidably connected to the inner wall of the interception cylinder 27, the side wall of the transmission shaft 22 passes through the separation cylinder 20, and the side wall of the transmission shaft 22 is rotatably connected to the inner wall of the separation cylinder 20;

[0045] It should be noted that the staff let the L-valine mixed liquid enter the separation cylinder 20 through the feed pipe 26, the L-valine mixed liquid is filtered through the filter hole 28, and the garbage in the L-valine mixed liquid stays in the blocking cylinder 27. The first drive motor 21 is started, and the first drive motor 21 drives the stirring blade 23 to rotate through the transmission shaft 22. The stirring blade 23 drives the L-valine mixed liquid to rotate and throws out the L-valine mixed liquid through centrifugal force. At the same time, the stirring blade 23 drives the cleaning soft brush 24 to rotate and brush the filter hole 28 to prevent garbage impurities from clogging the filter hole 28 and affecting its filtration efficiency.

[0046] Embodiment 2

[0047] See also Figure 3 , this embodiment provides a technical solution based on the first embodiment: the storage mechanism 3 also includes an electric telescopic tube 35, the top of the electric telescopic tube 35 is connected to the bottom of the separation cylinder 20, the electric telescopic tube 35 is provided with a first solenoid valve 34, the side wall of the electric telescopic tube 35 is slidably connected with a connecting tube 33, the bottom of the connecting tube 33 is connected to a storage box 32, a slide groove 36 is opened at the top of the crystallization cylinder 30, the bottom of the inner wall of the slide groove 36 is fixedly connected with an electric slide rail 31, the electric slide rail 31 is slidably connected to the storage box 32 through an electronic slider, and the side wall of the storage box 32 is slidably connected to the inner wall of the slide groove 36;

[0048] It should be noted that, through the setting of the water level monitor 25, when the L-valine mixed liquid inside the separation cylinder 20 is completely separated, the water level monitor 25 controls the electric telescopic tube 35 to extend into the connecting tube 33, opens the first solenoid valve 34, and the garbage and impurities inside the separation cylinder 20 enter the storage box 32 through the electric telescopic tube 35 and the connecting tube 33 for storage, and the staff does not need to collect them manually. When the electric telescopic tube 35 is away from the connecting tube 33, the electric slide rail 31 is started, and the electric slide rail 31 drives the storage box 32 to move out of the equipment, so that the staff can more conveniently take out the garbage and impurities, reducing the labor intensity of the staff.

[0049] Embodiment 3

[0050] See also Figure 4-Figure 5 , this embodiment provides a technical solution based on the first embodiment: the crystallization mechanism 4 includes a drying box 40, the inner wall of the crystallization cylinder 30 is fixedly connected to the side wall of the drying box 40, the inner wall of the crystallization cylinder 30 is slidably connected to a rotating plate 41, the top of the rotating plate 41 is fixedly connected to a rotating blade 42, the bottom of the rotating plate 41 is fixedly connected to a reset spring 45, the top of the inner wall of the crystallization cylinder 30 is fixedly connected to a second drive motor 46, the top of the inner wall of the crystallization cylinder 30 is fixedly connected to a protection bin 47, the second drive motor 46 is connected to the output end A rotating block 48 is fixedly connected, a slot 49 is provided at the bottom of the reset spring 45, a liquid inlet pipe 43 is connected to the side wall of the crystallization cylinder 30, a second solenoid valve 431 is provided on the liquid inlet pipe 43, an extraction pipe 44 is connected to the side wall of the crystallization cylinder 30, a third solenoid valve 441 is provided on the extraction pipe 44, the side wall of the rotating block 48 is slidably connected to the inner wall of the slot 49, the side wall of the rotating block 48 passes through the protection bin 47, and the side wall of the rotating block 48 is rotatably connected to the inner wall of the protection bin 47, and the side wall of the rotating blade 42 is rotatably connected to the inner wall of the crystallization cylinder 30;

[0051] It should be noted that when the L-valine solution enters the crystallization cylinder 30 through the feed pipe 29, the L-valine solution falls to the surface of the rotating plate 41, and the rotating plate 41 is pressed down by gravity until the rotating block 48 enters the slot 49, the second solenoid valve 431 is opened, and the adjustment solution is input into the crystallization cylinder 30 through the liquid inlet pipe 43, the second drive motor 46 drives the rotating blade 42 to rotate through the rotating block 48 and the rotating plate 41 to stir the L-valine solution and the adjustment solution, accelerate the crystallization of L-valine, start the drying box 40 to heat the mixed solution to evaporate impurities, and at the same time dry the L-valine crystals to facilitate their storage, and when the crystals need to be taken out, the third solenoid valve 441 is opened, and the extraction pipe 44 takes out the L-valine crystals in the crystallization cylinder 30.

[0052] Embodiment 4

[0053] See also Figure 1-Figure 5, a method for purifying L-valine, comprising the following steps:

[0054] S1, the staff inputs the L-valine mixed solution into the separation cylinder 20 through the feed pipe 26 to perform solid-liquid separation;

[0055] S2. After the L-valine mixed solution is separated, the garbage impurities are input into the storage box 32 through the electric telescopic tube 35 and the connecting tube 33, and are collected and stored;

[0056] S3, the L-valine solution enters the crystallization cylinder 30, and the first solenoid valve 34 inputs the regulating solution to react with the L-valine solution for crystallization;

[0057] S4. After the L-valine crystallization is completed, the drying box 40 is started to dry the L-valine to extend its storage time.

[0058] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0059] During operation, the staff feeds the L-valine mixed solution into the separation cylinder 20 through the feed pipe 26, and the L-valine mixed solution is filtered through the filter holes 28. The garbage in the L-valine mixed solution stays in the blocking cylinder 27. The first drive motor 21 is started, and the first drive motor 21 drives the stirring blade 23 to rotate through the transmission shaft 22. The stirring blade 23 drives the L-valine mixed solution to rotate and throws the L-valine mixed solution out through centrifugal force. At the same time, the stirring blade 23 drives the cleaning soft brush 24 to rotate and scrub the filter holes 28 to prevent garbage impurities from clogging the filter holes 28 and affecting its filtering efficiency.

[0060] Through the setting of the water level monitor 25, when the L-valine mixed liquid in the separation cylinder 20 is completely separated, the water level monitor 25 controls the electric telescopic tube 35 to extend into the connecting tube 33, opens the first solenoid valve 34, and the garbage and impurities in the separation cylinder 20 enter the storage box 32 through the electric telescopic tube 35 and the connecting tube 33 for storage, without the need for manual collection by the staff. When the electric telescopic tube 35 is away from the connecting tube 33, the electric slide rail 31 is started, and the electric slide rail 31 drives the storage box 32 to move out of the equipment, so that the staff can more conveniently take out the garbage and impurities, reducing the labor intensity of the staff;

[0061] When the L-valine solution enters the crystallization cylinder 30 through the feed pipe 29, the L-valine solution falls to the surface of the rotating plate 41, and the rotating plate 41 is pressed down by gravity until the rotating block 48 enters the slot 49, the second solenoid valve 431 is opened, and the adjustment solution is input into the crystallization cylinder 30 through the liquid inlet pipe 43, the second drive motor 46 drives the rotating blade 42 to rotate through the rotating block 48 and the rotating plate 41 to stir the L-valine solution and the adjustment solution, accelerate the crystallization of L-valine, start the drying box 40 to heat the mixed solution to evaporate impurities, and at the same time dry the L-valine crystals to facilitate their storage, when the crystals need to be taken out, open the third solenoid valve 441, and the extraction pipe 44 takes out the L-valine crystals in the crystallization cylinder 30.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification device for L-valine, characterized in that, include: A storage mechanism (3), the storage mechanism (3) being used to store waste in the L-valine mixture, and a support leg (1) arranged at the bottom of the storage mechanism (3); A separation mechanism (2), the separation mechanism (2) is used to separate the solid and the liquid in the L-valine mixture; A crystallization mechanism (4), the crystallization mechanism (4) is used to solidify and crystallize the L-valine solution; The top of the support leg (1) is fixedly connected to the bottom of the storage mechanism (3), the top of the storage mechanism (3) is fixedly connected to the bottom of the separation mechanism (2), and the top of the storage mechanism (3) is in communication with the bottom of the separation mechanism (2); The storage mechanism (3) comprises: a crystallization cylinder (30), the crystallization cylinder (30) being used to solidify and crystallize L-valine; the top of the crystallization cylinder (30) being fixedly connected to the bottom of the separation mechanism (2), and the bottom of the crystallization cylinder (30) being fixedly connected to the top of the support leg (1); The crystallization mechanism (4) comprises a drying box (40), the inner wall of the crystallization cylinder (30) is fixedly connected to the side wall of the drying box (40), the inner wall of the crystallization cylinder (30) is slidably connected to a rotating plate (41), the top of the rotating plate (41) is fixedly connected to a rotating blade (42), the bottom of the rotating plate (41) is fixedly connected to a return spring (45), the top of the inner wall of the crystallization cylinder (30) is fixedly connected to a second drive motor (46), the top of the inner wall of the crystallization cylinder (30) is fixedly connected to a protection bin (47), the second drive motor (46) is fixedly connected to a rotating block (48) via an output end, the bottom of the return spring (45) is provided with a slot (49), the side wall of the crystallization cylinder (30) is connected to a liquid inlet pipe (43), and the liquid inlet pipe (43) is provided with a second solenoid valve (431), The side wall of the crystallization cylinder (30) is connected to an extraction pipe (44), and a third solenoid valve (441) is provided on the extraction pipe (44). The side wall of the rotating block (48) is slidably connected to the inner wall of the slot (49), the side wall of the rotating block (48) passes through the protection bin (47), and the side wall of the rotating block (48) is rotatably connected to the inner wall of the protection bin (47), and the side wall of the rotating blade (42) is rotatably connected to the inner wall of the crystallization cylinder (30).

2. A purification device for L-valine according to claim 1, characterized in that: The separation mechanism (2) comprises a separation cylinder (20), the bottom of the separation cylinder (20) being fixedly connected to the top of the crystallization cylinder (30), the top of the separation cylinder (20) being fixedly connected to a first drive motor (21), the output end of the first drive motor (21) being fixedly connected to a transmission shaft (22), a stirring blade (23) being fixedly connected to the side wall of the transmission shaft (22), a cleaning soft brush (24) being fixedly connected to the side of the stirring blade (23) away from the transmission shaft (22), a water level monitor (25) being fixedly connected to the top of the inner wall of the separation cylinder (20), the top of the separation cylinder (20) being connected to a feed pipe (26), a one-way valve (261) being provided on the feed pipe (26), an intercepting cylinder (27) being fixedly connected to the inner wall of the separation cylinder (20), a filter hole (28) being provided in the intercepting cylinder (27), and a feed pipe (29) being connected to the bottom of the separation cylinder (20).

3. A purification device for L-valine according to claim 2, characterized in that: The cleaning soft brush (24) is slidably connected to the inner wall of the blocking cylinder (27) on the side away from the stirring blade (23), the side wall of the transmission shaft (22) passes through the separation cylinder (20), and the side wall of the transmission shaft (22) is rotatably connected to the inner wall of the separation cylinder (20).

4. A purification device for L-valine according to claim 1, characterized in that: The storage mechanism (3) further comprises an electric telescopic tube (35), the top of the electric telescopic tube (35) being connected to the bottom of the separation cylinder (20), the electric telescopic tube (35) being provided with a first solenoid valve (34), the side wall of the electric telescopic tube (35) being slidably connected to a connecting tube (33), the bottom of the connecting tube (33) being connected to a storage box (32), the top of the crystallization cylinder (30) being provided with a slide groove (36), the bottom of the inner wall of the slide groove (36) being fixedly connected to an electric slide rail (31).

5. A purification device for L-valine according to claim 4, characterized in that: The electric slide rail (31) is slidably connected to the storage box (32) via an electronic slider, and the side wall of the storage box (32) is slidably connected to the inner wall of the slide groove (36).

6. A method for purifying L-valine, applied to the L-valine purification device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. A staff member feeds the L-valine mixed solution into the separation cylinder (20) through the feed pipe (26) to perform solid-liquid separation; After the separation of S2 and L-valine mixed solution is completed, the garbage impurities are input into the storage box (32) through the electric telescopic tube (35) and the connecting tube (33) to be collected and stored; S3, the L-valine solution enters the interior of the crystallization cylinder (30), and the first solenoid valve (34) inputs the regulating solution to react with the L-valine solution for crystallization; S4. After the L-valine is crystallized, the drying box (40) is started to dry it to extend its storage time.

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